result = recvfrom(udp_sockfd,buffer,1000,0,(struct sockaddr*)&sourAddr,&len);
buffer[result] = '\n';
result = sendto(udp_sockfd,buffer,result,0,(struct sockaddr*)&sourAddr,len);
客户端:
int result = 0;
struct sockaddr_in sourAddr;
int len = sizeof(sourAddr);
result = recvfrom(udp_sockfd,buffer,MAX_BUFFER,0,(sockaddr*)&sourAddr,&len); //阻塞在此处!!!!!!!!!!!!!!!!!